Phenology, Leaf Area and Yield of Spring Maize (Cv. Azam) as Affected by Levels and Timings of Potassium Application

Abstract

Abstract: Maize is one of the most important cereal crop of NWFP after wheat while potash is the third most important crop nutrient after nitrogen and phosphorus that increase yield of maize. The objective of our present experiment was to study phenology, leaf area and grain yield potential of spring maize (cv. Azam) to different rates and timings of potassium application under irrigated conditions of N.W.F.P Agricultural University, 1 Peshawar. The factorial experiment consisted of four levels (0, 30, 60 and 90 kg ha) and three timings of potassium application (T 1 = One split i.e. 100 % at sowing time, T 2 = Two splits i.e. 50 % at sowing and 50 % at 15 DAE an T 3 = Three splits i.e. 33.3 % at sowing, 33.3 % at 15 DAE and 33.3 % at30 DAE). The experiment was 2 laid out in split plot design with three replications and a subplot size of 3×4 m was maintained. Different potash levels were kept in the main plots while potash timings were assigned to the subplots. Our present results shows that potash levels and timings significantly affected phenology, flag leaf area and grain yield of spring maize. However average leaf area was significantly not affected by levels and timings of K application. Tasseling, silking and physiological maturity was delayed when potash levels was increased up to 60 kg ha, 1

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